TRS3238CPWR

www.ti.com TRS3238 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION FEATURES • • • • • • • • • • RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human-Body Model (HBM) Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU v.28 Standards Operates With 3-V to 5.5-V VCC Supply Operates up to 250 kbit/s Five Drivers and Three Receivers Low Standby Current . . . 1 μA Typical External Capacitors . . . 4 × 0.1 μF Accepts 5-V Logic Input With 3.3-V Supply Always-Active Noninverting Receiver Output (ROUT1B) Alternative High-Speed Pin-Compatible Device (1 Mbit/s) – TRSF3238 SLLS817 – JULY 2007 DB OR PW PACKAGE (TOP VIEW) C2 + GND C2− V− DOUT1 DOUT2 DOUT3 RIN1 RIN2 DOUT4 RIN3 DOUT5 FORCEON FORCEOFF 1 28 2 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 C1+ V+ VCC C1− DIN1 DIN2 DIN3 ROUT1 ROUT2 DIN4 ROUT3 DIN5 ROUT1B INVALID APPLICATIONS • • • • • • • • • Battery-Powered Systems PDAs Notebooks Subnotebooks Laptops Palmtop PCs Hand-Held Equipment Modems Printers DESCRIPTION/ORDERING INFORMATION The TRS3238 consists of five line drivers, three line receivers, and a dual charge-pump circuit with ±15-kV ESD (HBM) protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between notebook and subnotebook computer applications. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output (ROUT1B), which allows applications using the ring indicator to transmit data while the device is powered down. The TRS3238 operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/μs driver output slew rate. Flexible control options for power management are featured when the serial port and driver inputs are inactive. The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense valid signal transitions on all receiver and driver inputs for approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to 1 μA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON and FORCEOFF are high. With auto-powerdown plus enabled, the device activates automatically when a valid signal is applied to any receiver or driver input. INVALID is high (valid data) if any receiver input voltage is greater than 2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less than 30 μs. INVALID is low (invalid data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 μs. Refer to Figure 5 for receiver input levels. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2007, Texas Instruments Incorporated TRS3238 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH ±15-kV ESD (HBM) PROTECTION www.ti.com SLLS817 – JULY 2007 ORDERING INFORMATION PACKAGE (1) (2) TA SSOP – DB 0°C to 70°C TSSOP – PW SSOP – DB –40°C to 85°C TSSOP – PW (1) (2) ORDERABLE PART NUMBER Tube of 50 TRS3238CDB Reel of 2000 TRS3238CDBR Tube of 50 TRS3238CPW Reel of 2000 TRS3238CPWR Tube of 50 TRS3238IDB Reel of 2000 TRS3238IDBR Tube of 50 TRS3238IPW Reel of 2000 TRS3238IPWR TOP-SIDE MARKING TRS3238C RS38C TRS3238I TRS38I Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. FUNCTION TABLES Each Driver (1) INPUTS DIN (1) FORCEON FORCEOFF TIME ELAPSED SINCE LAST RIN OR DIN TRANSITION OUTPUT DOUT DRIVER STATUS X X L X Z Powered off L H H X H H H H X L Normal operation with auto-powerdown disabled L L H 30 s Z Normal operation with auto-powerdown enabled Powered off by auto-powerdown plus feature H = high level, L = low level, X = irrelevant, Z = high impedance Each Receiver (1) INPUTS (1) 2 OUTPUTS RIN1 RIN2–RIN3 FORCEOFF TIME ELAPSED SINCE LAST RIN OR DIN TRANSITION ROUT1B ROUT L X L X L Z H X L X H Z L L H